04/03/2018
The sight of a black cab, or indeed any licensed private hire vehicle, is a familiar and comforting one across the United Kingdom. Whether you're rushing to a crucial meeting, making your way home after a late night, or simply seeking a convenient mode of transport, the humble taxi plays an indispensable role in our daily lives. Yet, despite its commonality, the word itself often sparks a curious linguistic debate: what, precisely, is the correct plural form of 'taxi'? Is it 'taxis' or 'taxies'? This seemingly simple question opens a fascinating window into the evolution of our language and the multifaceted uses of this single word.

The Ubiquitous British Taxi
Before delving into the grammatical intricacies, let's appreciate the cultural significance of the taxi in the UK. For many, the iconic black cab, or Hackney Carriage, symbolises London itself, a mobile piece of heritage navigating the labyrinthine streets. These vehicles, alongside their equally important private hire counterparts, provide a vital public service, offering door-to-door convenience that public transport simply cannot always match. They are more than just cars; they are mobile offices, confidantes, and sometimes, the very last resort for a weary traveller.
The image of a London black cab contrasts sharply with the yellow cabs often associated with American culture, as highlighted in the source material. This distinction underscores the unique identity of the British taxi – a blend of tradition, rigorous licensing, and a commitment to service that has defined urban transport for generations. Whether you're hailing one with a raised hand or pre-booking through an app, the expectation of a professional and reliable journey remains paramount.
Decoding the Plural: Is it Taxis or Taxies?
Now, to the heart of the matter: the plural of 'taxi'. The answer, perhaps surprisingly, is that both 'taxis' and 'taxies' can be correct, but their usage depends entirely on whether you are referring to the noun or the verb. This is a crucial linguistic distinction that often trips up even native speakers.

'Taxis': The Plural Noun
When you are referring to multiple vehicles available for public transportation, the correct plural form is taxis. This is the most common usage and follows the standard rule for nouns ending in -i, where simply adding -s forms the plural. For example:
- "There were many taxis at the station, all waiting for passengers."
- "Large cities often have hundreds of taxis operating 24/7."
- "The company operates a large fleet of taxis."
This form is unambiguous and universally understood when speaking about the vehicles themselves. It aligns with how we pluralise similar words like 'alibi' (alibis) or 'ski' (skis).
'Taxies': The Third-Person Singular Verb
The form 'taxies' is also correct, but it serves a very different grammatical purpose. It is the third-person singular simple present tense of the verb 'to taxi'. This verb predominantly refers to the movement of an aircraft on the ground under its own power, typically before takeoff or after landing. For example:
- "The pilot taxies the plane carefully towards the runway."
- "She taxies the jet to the gate after a smooth landing."
- "The aircraft taxies for several minutes before taking off."
While less common in everyday conversation about road vehicles, the verb 'to taxi' can also mean to travel by taxicab, or to transport someone by taxi, though this usage is less frequent than the aviation context.
To summarise the distinction:
| Form | Part of Speech | Meaning | Example |
|---|---|---|---|
| Taxis | Noun (Plural) | Multiple hired vehicles for transport | "Many taxis were available." |
| Taxies | Verb (3rd Person Singular Present) | An aircraft moving on the ground | "The pilot taxies the plane." |
A Journey Through Time: The Etymology of 'Taxi'
The word 'taxi' itself has a fascinating etymology, a testament to the ingenuity of early 20th-century transport. It is a shortened form of 'taximeter cab'. The term 'taximeter' refers to the automatic meter that records the distance travelled and calculates the fare. This word, in turn, has European roots, coming from the French 'taximètre', which was derived from the German 'Taxameter'. The ultimate origin lies in the Medieval Latin 'taxa', meaning 'tax' or 'charge'.
This lineage highlights the core function of the early cabs: providing a metered service where the 'tax' or charge was automatically calculated. The simplification from 'taximeter cab' to 'taxi' is a classic example of linguistic efficiency, where a longer, more descriptive term is streamlined into a punchy, easily pronounceable word that quickly became commonplace. The word's journey from Medieval Latin through German and French before settling into English perfectly illustrates the interconnectedness of languages.

Beyond the Road: 'Taxi' in Aviation
The use of 'taxi' in an aviation context is particularly intriguing. While it might seem unrelated to road transport, its origin is quite pragmatic. Early slang for training aircraft used for practicing ground operations was that they "drove around the airfield like a taxicab." This informal comparison eventually led to the verb 'to taxi' being universally adopted for any aircraft movement on the ground under its own power.
This includes the entire process from the stand to the runway for takeoff, and from the runway to the gate after landing. During this phase, critical procedures are performed, such as extending flaps and slats, and starting additional engines. Passengers are often instructed to keep seatbelts fastened during taxi, takeoff, turbulence, and landing, underscoring the importance and controlled nature of this ground movement. It's a testament to the word's adaptability that it transitioned so seamlessly from a road vehicle to a fundamental aviation term.
Synonyms and Slang: Other Ways to Say It
While 'taxi' is the most widely recognised term, especially in the UK, there are several synonyms and related terms that you might encounter:
- Cab: A very common and often interchangeable term for 'taxi', particularly in informal contexts. "I'll just hail a cab."
- Taxicab: The full, original term from which 'taxi' is shortened. Still used, though less frequently than its abbreviated form.
- Autocab: A less common, somewhat dated term, but historically used to refer to a motorised cab.
- Motorcab: Similar to autocab, another dated term for a motorised vehicle for hire.
In some regions, particularly South Africa and Iran as noted in the source material, 'taxi' can also refer to a 'shared taxi', a concept less common in the UK but highlighting the global variations in transport terminology. This demonstrates how a single word can evolve different nuances and specific meanings depending on geographical and cultural contexts.
The Convenience of Hailing a Taxi in the UK
Beyond the linguistic discussion, the practical convenience of a taxi in the UK remains its most compelling feature. Whether it's the distinctive 'for hire' light of a black cab in a bustling city centre or a pre-booked private hire vehicle arriving at your doorstep, taxis offer a personalised transport solution that is often unparalleled.

Consider the scenarios:
- Late-night travel: When public transport options dwindle, a taxi provides a safe and direct route home.
- Carrying luggage: For journeys to airports or train stations, the ample boot space of a taxi is invaluable.
- Time sensitivity: When punctuality is paramount, a taxi can often navigate traffic more efficiently and take direct routes.
- Group travel: For small groups, sharing a taxi can sometimes be more cost-effective and certainly more comfortable than multiple bus or train tickets.
- Accessibility: Many modern black cabs are designed with accessibility in mind, accommodating wheelchairs and offering ramps, making them a lifeline for individuals with mobility challenges.
The ability to simply call out "Taxi!" and have a vehicle pull up to the curb, as described in the 1932 quote from 'King Kong', speaks to a timeless aspect of urban life that persists to this day, albeit with the added convenience of smartphone apps for booking.
Frequently Asked Questions About 'Taxi'
To further clarify the common queries surrounding this versatile word, here are some frequently asked questions:
Q1: What is the most common plural of 'taxi' for the vehicle?
A1: The most common and correct plural for the vehicle is 'taxis'.
Q2: When would 'taxies' be the correct form?
A2: 'Taxies' is the correct form for the third-person singular present tense of the verb 'to taxi', primarily used when an aircraft moves on the ground under its own power (e.g., "The pilot taxies the plane"). It can also mean to travel by taxi, but this usage is less common.
Q3: Where did the word 'taxi' originally come from?
A3: 'Taxi' is a shortened form of 'taximeter cab', deriving from the French 'taximètre' and ultimately from the Medieval Latin 'taxa' meaning 'tax' or 'charge'.

Q4: Can 'taxi' be used as a verb?
A4: Yes, 'taxi' can be used as a verb. Its most common verbal use is to describe an aircraft moving on the ground, but it can also mean to travel by taxicab or to transport someone by taxi.
Q5: Are 'taxi' and 'cab' interchangeable?
A5: Generally, yes, 'taxi' and 'cab' are largely interchangeable, especially in informal conversation. 'Cab' is a common synonym for 'taxi' in the UK and elsewhere.
Conclusion
The humble 'taxi' is far more than just a means of transport; it's a linguistic chameleon, adapting its form and meaning depending on context. From its fascinating historical roots as a 'taximeter cab' to its dual life as both a plural noun ('taxis') and a singular verb ('taxies'), the word offers a delightful journey through the intricacies of the English language. So, the next time you spot a line of taxis at the station, or hear a pilot say they will 'taxi' to the runway, you can appreciate not just the convenience they offer, but also the rich and varied story behind their name.
If you want to read more articles similar to The Plural Truth: Taxis or Taxies?, you can visit the Taxis category.
